import java.util.Scanner;

public class VolatileTest {
    private volatile static int n = 0;
    public static void main(String[] args) {
        Thread t1 = new Thread(()->{
            while (n == 0) {

            }
        });
        Thread t2 = new Thread(()->{
            Scanner scanner = new Scanner(System.in);
            System.out.println("请输入一个整数");
            n = scanner.nextInt();
        });
        t1.start();
        t2.start();
    }
}
